✨ Add parameter to configure the ban page Content-Type response header (#325)

* Add parameter to configure Ban Response Content-Type

* Add testing for new BanResponseContentType parameter

* Ensure there is a fallback to default Content-Type is user provided empty value

* Set Content-Type even if banTemplate is nil

* Add more edge cases for testing ban response Content-Type

* Add CR/LF validation for BanResponseContentType

* Add CaptchaResponseContentType to allow separate Content-Type configuration for captcha responses

* Add testing for new CaptchaResponseContentType

* Update README

* Split nil and CR/LF response Content-Type value validation into separate function

* Throw error instead of setting the default in case of empty parameter declaration

* Update testing accordingly

* ✨ remove HTML from var name, add tests and infer content type from filePath

* 🍱 fix lint ?

* 🍱 fix lint

* 🍱 fix lint

* 🍱 fix lint + naming

* 🍱 fix lint

* 🍱 fuck lint

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Co-authored-by: maxlerebourg <maxlerebourg@gmail.com>

tests/e2e/mock/scenarios/custom-ban-page/dynamic.yml

@@ -24,5 +24,6 @@ http:
           crowdsecLapiKey: "@@APIKEY@@"
           forwardedHeadersTrustedIps:
             - "127.0.0.1/32"
-          banHtmlFilePath: "@@SCENARIO_DIR@@/ban.html"
+          banFilePath: "@@SCENARIO_DIR@@/ban.json"
           remediationHeadersCustomName: "X-E2E-Remediation"
+          traceHeadersCustomName: x-trace