Added tools folder

- Moved providers scrapper by @Teifun2 into tool folder
- Added code generator for avoid the use of env variables (wip)

tools/dns_challenge_update/code-gen/README.md

@@ -0,0 +1,38 @@
+### DNS Challenge Update Data Structure Code Generator
+
+This script is designed to automatically pull lego, update the providersdef module with new json file and create a function for automatically create a provider based on the given providers name and config json.
+
+### Usage
+
+To update the module, simply run update.sh 
+
+```
+./update.sh
+```
+
+The updated files will be written into the providersdef folder. Then, you can copy it to the ACME module folder (or later-on a CICD pipeline will be made to do this automatically, but for now you have to manually copy it into the module under `src/mod/`)
+
+
+
+### Module Usage
+
+To use the module, you can call to the following function inside the providersdef 
+
+```go
+func GetDNSProviderByJsonConfig(name string, js string)(challenge.Provider, error)
+
+//For example
+providersdef.GetDNSProviderByJsonConfig("gandi", "{\"Username\":\"far\",\"Password\":\"boo\"}")
+```
+
+
+
+This should be able to replace the default lego v4 build in one (the one attached below) that requires the use of environment variables
+
+```go
+// NewDNSChallengeProviderByName Factory for DNS providers.
+func NewDNSChallengeProviderByName(name string) (challenge.Provider, error)
+```
+
+
+