feat: safe funcs, follow go template standards and sprout conventions

[42atomys]

Description

This pull request updates all signatures to follow Go template standards and Sprout conventions, and add the safe behavior for functions instead of must as discussed on #32

Important

The signature changes do not introduce breaking changes. A deprecation notice will be displayed instead.
Two types of warn :

1. Warn of renamed function :

WARN Template function `mustDateModify` is deprecated: please use `dateModify` instead

2. Warn of signature changes:

WARN Template function `without` is deprecated: 
The signature of `without` has changed from `{{ without list 1 2 }}` to `{{ list | without 1 2 }}`,
please update your code before next upgrade.
This change will simplify the usage of the function and
respect go/template conventions and allow usage of pipe (`|`).

Note

This will spam the logger but will inform and prevent any breaking changes in the code. The signature migrations are encapsulated by banners in the codebase to avoid missing them when we remove the old signatures.

Documentation are available here : https://docs.atom.codes/sprout/~/changes/1eETtqCYtVeEPVLnbGs0?r=W7cRL8cXHka2XCuOcvBs

Checklist

• I have read the CONTRIBUTING.md document.
• My code follows the code style of this project.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated the documentation accordingly.
• This change requires a change to the documentation on the website.

Additional Information

Registry Name	Respect Function Signature	Respect Pipe Syntax	Notes
backward	✅	❌	This registry are deprecated and cannot be migrated
checksum	✅	✅
conversion	✅	✅	Deprecation of must functions
crypto	❌	❌	This registry are deprecated and cannot be migrated
encoding	✅	✅	Deprecation of must functions
env	✅	✅
_example	✅	✅
filesystem	✅	✅
maps	✅	✅	Changes in signature parameters, Deprecation of must functions
numeric	✅	✅	Changes in signature parameters, Deprecation of must functions
random	✅	✅
reflect	✅	✅	Deprecation of must functions
regexp	✅	✅	Deprecation of must functions
semver	✅	✅
slices	✅	✅	Changes in signature parameters
std	✅	✅
strings	✅	✅
time	✅	✅	Deprecation of must functions
uniqueid	✅	✅

[42atomys]

Documentation are updated : https://docs.atom.codes/sprout/~/changes/1eETtqCYtVeEPVLnbGs0?r=W7cRL8cXHka2XCuOcvBs

[ccoVeille]

I only reviewed a part of your changes yet

[ccoVeille]

You should consider running testifylint on your codebase.

You can enable it via golangci-lint

[42atomys]

hi @ccoVeille, review returns done, one discussion stay open to let you read and react : #65 (comment)

Thanks for your time :)

[ccoVeille]

approved but a few suggestion anyway

[codecov]

Codecov Report

Attention: Patch coverage is 98.36957% with 12 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
registry/backward/functions.go	66.6%	3 Missing and 1 partial ⚠️
registry/encoding/functions.go	89.1%	4 Missing ⚠️
registry/random/functions.go	25.0%	2 Missing and 1 partial ⚠️
registry/backward/backward.go	0.0%	1 Missing ⚠️

Files with missing lines	Coverage Δ
deprecated/deprecated.go	100.0% <100.0%> (ø)
error.go	100.0% <100.0%> (ø)
handler.go	100.0% <100.0%> (ø)
internal/runtime/safecall.go	100.0% <100.0%> (ø)
notice.go	100.0% <100.0%> (ø)
pesticide/rand_test_helpers.go	100.0% <100.0%> (ø)
pesticide/test_helpers.go	100.0% <100.0%> (ø)
registry/checksum/functions.go	100.0% <100.0%> (ø)
registry/conversion/conversion.go	92.0% <100.0%> (+2.0%)	⬆️
registry/conversion/functions.go	100.0% <100.0%> (ø)
... and 24 more