Introduce options for customizing the normal mode's prompt

[resolritter]

First of all, thanks for this great software.

I'd like to have a "Vim-like" minimalistic normal mode prompt without the default filename + background highlighting. I was not able to customize the prompt to my liking with the current options, thus I created two new ones: HidePromptFilename and InvertPromptColor. In my ~/.config/ov/config.yaml I am setting them like this:

HidePromptFilename: true
InvertPromptColor: false

I also thought of organizing all prompt-related options into a single Config entry, like this:

+type OVPromptConfig struct {
+	HideFilename       bool
+	InvertColor        bool
+}
+
 // Config represents the settings of ov.
 type Config struct {
 	Keybind                  map[string][]string
@@ -192,8 +197,7 @@ type Config struct {
 	RegexpSearch             bool
 	Incsearch                bool
 	Debug                    bool
-	HidePromptFilename       bool
-	InvertPromptColor        bool
+	Prompt                   OVPromptConfig
 }

What do you think?

[noborus]

Thank you for your wonderful pull request.
I was thinking of postponing customizing the prompts until there was a demand.
I like your idea, but if others want to customize the prompt further, a boolean value may not be enough.
(If anyone else wants to customize it further, let me know in the comments.)
I don't want the configuration to be as complicated as possible, so I'm willing to integrate if this is good enough.

[resolritter]

I like your idea, but if others want to customize the prompt further, a boolean value may not be enough.

Yes, I agree. I don't think that the initial design is flexible enough if we take into account the possibility of further customizations in the future.

Based on that feedback, I grouped the options under Prompt.Normal. Let's imagine a few possibilities based on this new design:

• Customize the prompt's color: Prompt.Normal.Color: "#FF0000"
• Control the prompt's modeStatus display: Prompt.Normal.ShowModeStatus: false
• Use a preset style: Prompt.Normal.Style: "minimal"

Likewise, we'll allow for other modes to be customized independently through Prompt.[ModeName], e.g. Prompt.InputSearch.Icon: ">>".

Please let me know if you have other ideas or suggestions.

[noborus]

Thank you for your improvement.
Another way I'm thinking of is to create a format that supports variable substitution like a shell prompt.
(I haven't decided to do so yet).

[noborus]

Late, but decided to merge.
Thank you for the pr!