feat: implement `HTMX` plugin using `litestar-htmx` #4237

Job	Run time
pyright	1m 39s
slotscheck	1m 28s
mypy	2m 1s
Test Minimal Application with Base Dependencies	1m 10s
Test Minimal Pydantic 1 application	1m 10s
Test server integration (uvicorn<0.27.0)	1m 10s
test-platform-compat	0s
Test server integration (uvicorn>=0.27.0)	1m 9s
validate	47s
test (3.11) / test	2m 20s
test (3.10) / test	2m 35s
test (3.12) / test	2m 35s
test (3.8) / test	2m 34s
test (3.9) / test	2m 32s
build-docs	1m 27s
upload-test-coverage	0s
codeql	0s
sonar	0s
	24m 37s

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