[FEAT] Added development environment files

+README.md

Makefile

@@ -0,0 +1,45 @@
+GO=go
+GOFLAGS=-race
+DEV_BIN=bin
+COV_PROFILE=cp.out
+
+export CGO_ENABLED = 1
+
+.DEFAULT_GOAL := build
+
+fmt:
+	$(GO) fmt ./...
+.PHONY: fmt
+
+vet: fmt
+	$(GO) vet ./...
+.PHONY: vet
+
+lint: vet
+	golint -set_exit_status=1 ./...
+.PHONY: lint
+
+test: lint
+	$(GO) clean -testcache
+	$(GO) test ./... -v
+.PHONY: test
+
+install: test
+	$(GO) install ./...
+.PHONY: install
+
+build: test
+	$(GO) build $(GOFLAGS) github.com/mdm-code/termcols/...
+.PHONY: build
+
+cover:
+	$(GO) test -coverprofile=$(COV_PROFILE) -covermode=atomic ./...
+	$(GO) tool cover -html=$(COV_PROFILE)
+.PHONY: cover
+
+clean:
+	$(GO) clean github.com/mdm-code/termcols/...
+	$(GO) mod tidy
+	$(GO) clean -testcache
+	rm -f $(COV_PROFILE)
+.PHONY: clean

README.md

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+Package termcols implements ANSI color codes that can be used to color text on
+the terminal. Different styles and foreground/background colors can be chained
+together through an intuitive package API to arrive at some cool visual
+effects.
+
+The selection of style and color control sequences implemented by the package
+was largely based on an exhaustive list of Select Graphic Rendition (SGR)
+control sequences available at [Wikipedia ANSI](https://en.wikipedia.org/wiki/ANSI_escape_code). It is a great resource
+in case one or more elements appear not to be supported in a given terminal.
+
+The Escape sequence for termcols is set to \033, which means that it should
+work without any issues with Bash, Zsh or Dash. Other shells might not support
+it.
+
+The same applies to 8-bit and 24-bit colors: there is no guarantee that these
+escape sequences are supported will be rendered properly on some terminals.
+Results may vary, so it is good practice to test it first for compatibility.
+
+See [Usage](#usage) section below to check how to use the public API of the
+package.
+
+
+## Installation
+
+```sh
+go get github.com/mdm-code/termcols
+```
+
+
+## Usage
+
+Here is an example of how to use the public API of the `termcols` package.
+
+```go
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fmt.Println("Hello, world!")
+}
+```
+
+
+## Development
+
+Consult [Makefile](Makefile) to see how to format, examine code with `go vet`,
+run unit test, run code linter with `golint` get test coverage and check if the
+package builds all right.
+
+Remember to install `golint` before you try to run tests and test the build:
+
+```sh
+go install golang.org/x/lint/golint@latest
+```
+
+
+## License
+
+Copyright (c) 2022 Michał Adamczyk.
+
+This project is licensed under the [MIT license](https://opensource.org/licenses/MIT).
+See [LICENSE](LICENSE) for more details.

go.mod

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+module github.com/mdm-code/termcols
+
+go 1.18