fix: Colima file-mount issues, mana-llm port, web app build errors

File-mount fixes (Colima mounts single files as directories):
- SearXNG: mount entire searxng/ dir instead of individual files
- VictoriaMetrics: mount prometheus/ dir instead of individual yml files
- Loki: mount loki/ dir instead of individual yaml file
- vmalert: mount prometheus/ dir for alerts
- Synapse: move config files to docker/matrix/config/ subdir
- Landings (nginx): copy configs from mounted dir via entrypoint

mana-llm port fix:
- Service hardcodes port 3025 in Dockerfile, was configured as 3020
- Update compose to use 3025 internally, fix health check and references

Web app Dockerfile fixes:
- mana-web: add missing MIDDLEWARE_URL build arg
- manadeck-web: add missing PUBLIC_API_URL build arg
- playground: add missing PUBLIC_MANA_LLM_URL build arg, add
  @manacore/shared-auth-stores dependency
- mukke-web: add missing svelte-i18n dependency

Remaining build issues (not fixed, deeper code problems):
- skilltree-web, inventar-web: Svelte 5 rune in shared package
  not compiled during Rollup build
- mana-web: MIDDLEWARE_URL may need additional server-side config

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/playground/apps/web/package.json

@@ -23,6 +23,7 @@
 	},
 	"dependencies": {
 		"@manacore/shared-auth": "workspace:*",
+		"@manacore/shared-auth-stores": "workspace:*",
 		"@manacore/shared-auth-ui": "workspace:*",
 		"@manacore/shared-branding": "workspace:*",
 		"@manacore/shared-i18n": "workspace:*",