feat: add option to emit response event on each callback & RunScriptCallback command for "once-off" callbacks

[makspll]

Summary

Largely, this is a refactor of the commands module, we now use a shared command RunScriptCallback to initiate internal callbacks. This command can also be used by consumers of BMS removing the need to have a full blown system to initiate one off callbacks.

At the same time, this adds a trigger_response field to the script callback event, when this is set to true:

• Event handlers will emit a ScriptCallbackResponseEvent with the response payload from the script
• Just as the RunScriptCallback command will do the same

This should give users more flexibility in running "once-off" callbacks, especially if they require scripts to output something from them. At the moment the best bet is to either:

• have an event handler in a temporary schedule
• run custom logic with event handler state

[github-actions]

Bencher Report

Branch	feat/response-callbacks
Testbed	linux-gha

Click to view all benchmark results

Benchmark	Latency	Benchmark Result nanoseconds (ns) (Result Δ%)	Upper Boundary nanoseconds (ns) (Limit %)
component/access Lua	📈 view plot 🚷 view threshold	3,337.30 ns (-33.15%) Baseline: 4,992.06 ns	6,438.08 ns (51.84%)
component/access Rhai	📈 view plot 🚷 view threshold	5,238.00 ns (-22.72%) Baseline: 6,778.29 ns	8,158.97 ns (64.20%)
component/get Lua	📈 view plot 🚷 view threshold	2,039.50 ns (-30.41%) Baseline: 2,930.64 ns	3,590.92 ns (56.80%)
component/get Rhai	📈 view plot 🚷 view threshold	3,983.90 ns (-19.02%) Baseline: 4,919.58 ns	6,092.42 ns (65.39%)
conversions/Mut::from	📈 view plot 🚷 view threshold	95.03 ns (-33.32%) Baseline: 142.50 ns	256.18 ns (37.09%)
conversions/Ref::from	📈 view plot 🚷 view threshold	96.90 ns (-31.20%) Baseline: 140.85 ns	253.62 ns (38.21%)
conversions/ScriptValue::List	📈 view plot 🚷 view threshold	286.10 ns (-58.49%) Baseline: 689.23 ns	1,056.11 ns (27.09%)
conversions/ScriptValue::Map	📈 view plot 🚷 view threshold	1,209.00 ns (-29.22%) Baseline: 1,708.08 ns	2,241.86 ns (53.93%)
conversions/ScriptValue::Reference::from_into	📈 view plot 🚷 view threshold	38.68 ns (-10.63%) Baseline: 43.29 ns	54.75 ns (70.65%)
conversions/Val::from_into	📈 view plot 🚷 view threshold	264.90 ns (-22.23%) Baseline: 340.60 ns	465.36 ns (56.92%)
function/call 4 args Lua	📈 view plot 🚷 view threshold	1,596.60 ns (-24.85%) Baseline: 2,124.47 ns	2,532.84 ns (63.04%)
function/call 4 args Rhai	📈 view plot 🚷 view threshold	1,385.40 ns (-24.93%) Baseline: 1,845.42 ns	2,223.57 ns (62.31%)
function/call Lua	📈 view plot 🚷 view threshold	225.49 ns (-20.27%) Baseline: 282.83 ns	340.25 ns (66.27%)
function/call Rhai	📈 view plot 🚷 view threshold	418.81 ns (-22.19%) Baseline: 538.23 ns	669.95 ns (62.51%)
math/vec mat ops Lua	📈 view plot 🚷 view threshold	6,371.60 ns (-18.92%) Baseline: 7,858.28 ns	9,320.65 ns (68.36%)
math/vec mat ops Rhai	📈 view plot 🚷 view threshold	6,027.80 ns (-19.49%) Baseline: 7,486.61 ns	8,686.41 ns (69.39%)
query/10 entities Lua	📈 view plot 🚷 view threshold	18,821.00 ns (-25.12%) Baseline: 25,134.37 ns	30,696.23 ns (61.31%)
query/10 entities Rhai	📈 view plot 🚷 view threshold	18,625.00 ns (-23.63%) Baseline: 24,387.77 ns	29,231.91 ns (63.71%)
query/100 entities Lua	📈 view plot 🚷 view threshold	39,493.00 ns (-22.03%) Baseline: 50,651.90 ns	61,840.48 ns (63.86%)
query/100 entities Rhai	📈 view plot 🚷 view threshold	31,811.00 ns (-19.67%) Baseline: 39,601.77 ns	48,396.75 ns (65.73%)
query/1000 entities Lua	📈 view plot 🚷 view threshold	274,380.00 ns (-12.42%) Baseline: 313,307.00 ns	388,383.67 ns (70.65%)
query/1000 entities Rhai	📈 view plot 🚷 view threshold	176,750.00 ns (-21.36%) Baseline: 224,772.00 ns	303,490.78 ns (58.24%)
reflection/10 Lua	📈 view plot 🚷 view threshold	5,362.00 ns (-18.59%) Baseline: 6,586.47 ns	7,677.37 ns (69.84%)
reflection/10 Rhai	📈 view plot 🚷 view threshold	14,722.00 ns (-10.61%) Baseline: 16,468.60 ns	18,157.15 ns (81.08%)
reflection/100 Lua	📈 view plot 🚷 view threshold	46,731.00 ns (-12.59%) Baseline: 53,462.73 ns	60,673.04 ns (77.02%)
reflection/100 Rhai	📈 view plot 🚷 view threshold	704,910.00 ns (-3.21%) Baseline: 728,255.33 ns	854,006.55 ns (82.54%)
resource/access Lua	📈 view plot 🚷 view threshold	3,005.80 ns (-31.65%) Baseline: 4,397.48 ns	5,571.75 ns (53.95%)
resource/access Rhai	📈 view plot 🚷 view threshold	4,559.50 ns (-24.85%) Baseline: 6,067.35 ns	7,595.68 ns (60.03%)
resource/get Lua	📈 view plot 🚷 view threshold	1,694.70 ns (-30.80%) Baseline: 2,448.82 ns	3,024.64 ns (56.03%)
resource/get Rhai	📈 view plot 🚷 view threshold	3,290.00 ns (-23.03%) Baseline: 4,274.39 ns	5,435.83 ns (60.52%)

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