Cleanup .eslingignore and add target

Since adding the new platform plugins target directories, we need to
update the eslintignore to reflect that.

Did a bit of organizing of the file for some sanity.

Signed-off-by: Tyler Smalley <tyler.smalley@elastic.co>

.eslintignore

@@ -1,46 +1,48 @@
-node_modules
-bower_components
-/data
-/optimize
-/build
-/target
+**/*.js.snap
+**/graphql/types.ts
 /.es
-/plugins
+/build
 /built_assets
+/data
 /html_docs
-/src/plugins/data/common/es_query/kuery/ast/_generated_/**
-/src/plugins/vis_type_timelion/public/_generated_/**
-src/legacy/core_plugins/vis_type_vislib/public/vislib/__tests__/lib/fixtures/mock_data
-/src/legacy/ui/public/flot-charts
+/optimize
+/plugins
 /test/fixtures/scenarios
-/src/legacy/core_plugins/console/public/webpackShims
+node_modules
+target
+
+!/.eslintrc.js
+
+# plugin overrides
+/src/core/lib/kbn_internal_native_observable
 /src/legacy/core_plugins/console/public/tests/webpackShims
+/src/legacy/core_plugins/console/public/webpackShims
+/src/legacy/core_plugins/vis_type_vislib/public/vislib/__tests__/lib/fixtures/mock_data
+/src/legacy/plugin_discovery/plugin_pack/__tests__/fixtures/plugins/broken
+/src/legacy/ui/public/flot-charts
 /src/legacy/ui/public/utils/decode_geo_hash.js
+/src/plugins/data/common/es_query/kuery/ast/_generated_/**
+/src/plugins/vis_type_timelion/public/_generated_/**
 /src/plugins/vis_type_timelion/public/webpackShims/jquery.flot.*
-/src/core/lib/kbn_internal_native_observable
-/packages/*/target
-/packages/eslint-config-kibana
-/packages/kbn-pm/dist
-/packages/kbn-plugin-generator/sao_template/template
-/packages/kbn-ui-framework/dist
-/packages/kbn-ui-framework/doc_site/build
-/packages/kbn-ui-framework/generator-kui/*/templates/
-/packages/kbn-test/src/functional_test_runner/__tests__/fixtures/
-/packages/kbn-test/src/functional_test_runner/lib/config/__tests__/fixtures/
-/x-pack/legacy/plugins/maps/public/vendor/**
-/x-pack/coverage
-/x-pack/build
 /x-pack/legacy/plugins/**/__tests__/fixtures/**
-/packages/kbn-interpreter/src/common/lib/grammar.js
+/x-pack/legacy/plugins/apm/e2e/cypress/**/snapshots.js
 /x-pack/legacy/plugins/canvas/canvas_plugin
+/x-pack/legacy/plugins/canvas/canvas_plugin_src/lib/flot-charts
 /x-pack/legacy/plugins/canvas/shareable_runtime/build
 /x-pack/legacy/plugins/canvas/storybook
-/x-pack/legacy/plugins/canvas/canvas_plugin_src/lib/flot-charts
 /x-pack/legacy/plugins/infra/common/graphql/types.ts
 /x-pack/legacy/plugins/infra/public/graphql/types.ts
 /x-pack/legacy/plugins/infra/server/graphql/types.ts
-/x-pack/legacy/plugins/apm/e2e/cypress/**/snapshots.js
-/src/legacy/plugin_discovery/plugin_pack/__tests__/fixtures/plugins/broken
-**/graphql/types.ts
-**/*.js.snap
-!/.eslintrc.js
+/x-pack/legacy/plugins/maps/public/vendor/**
+
+# package overrides
+/packages/eslint-config-kibana
+/packages/kbn-interpreter/src/common/lib/grammar.js
+/packages/kbn-plugin-generator/sao_template/template
+/packages/kbn-pm/dist
+/packages/kbn-test/src/functional_test_runner/__tests__/fixtures/
+/packages/kbn-test/src/functional_test_runner/lib/config/__tests__/fixtures/
+/packages/kbn-ui-framework/dist
+/packages/kbn-ui-framework/doc_site/build
+/packages/kbn-ui-framework/generator-kui/*/templates/
+