feat: add custom tranformer for terraform heroku generation

Signed-off-by: shashank381 <[email protected]>

custom-terraform-Heroku/README.md

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+## Custom default transformer to generate terraform artifacts to deploy simple app on Heroku
+
+
+### Prerequisites
+
+1. terraform tool installed
+2. heroku cli tool installed
+3. heroku configured with credentials
+
+### Run transform
+
+```
+move2kube transform -c move2kube-transformers/custom-terraform-Heroku -o heroku --overwrite
+```
+
+### Apply terraform artifacts
+
+```
+cd heroku
+terraform init
+terraform apply
+```

custom-terraform-Heroku/templates/learn-terraform-heroku/.gitignore

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+# Ignore application files
+node_modules
+
+# Local .terraform directories
+**/.terraform/*
+
+# .tfstate files
+*.tfstate
+*.tfstate.*
+
+# Crash log files
+crash.log
+
+# Ignore any .tfvars files that are generated automatically for each Terraform run. Most
+# .tfvars files are managed as part of configuration and so should be included in
+# version control.
+#
+# example.tfvars
+
+# Ignore override files as they are usually used to override resources locally and so
+# are not checked in
+override.tf
+override.tf.json
+*_override.tf
+*_override.tf.json
+
+# Include override files you do wish to add to version control using negated pattern
+#
+# !example_override.tf
+
+# Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan
+# example: *tfplan*
+
+# Ignore CLI configuration files
+.terraformrc
+terraform.rc
+terraform