Refactor codebase with improved structure and logging

- Restructured info.go with extracted helper functions for better readability
- Enhanced updateassets.go with cleaner asset processing logic and better error handling
- Improved client.go formatting and logging consistency
- Added logs.go for centralized logging functionality
- Updated dependencies in go.mod to include tint as direct dependency
- Cleaned up README.md with simplified installation instructions and structure
- Added comprehensive assets/ directory with build configuration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

assets/Makefile

@@ -0,0 +1,43 @@
+GO ?= $(shell command -v go 2> /dev/null)
+NPM ?= $(shell command -v npm 2> /dev/null)
+CURL ?= $(shell command -v curl 2> /dev/null)
+MM_DEBUG ?=
+GOPATH ?= $(shell go env GOPATH)
+GO_TEST_FLAGS ?= -race
+GO_BUILD_FLAGS ?=
+MM_UTILITIES_DIR ?= ../mattermost-utilities
+DLV_DEBUG_PORT := 2346
+DEFAULT_GOOS := $(shell go env GOOS)
+DEFAULT_GOARCH := $(shell go env GOARCH)
+
+export GO111MODULE=on
+
+# We need to export GOBIN to allow it to be set
+# for processes spawned from the Makefile
+export GOBIN ?= $(PWD)/bin
+
+# You can include assets this directory into the bundle. This can be e.g. used to include profile pictures.
+ASSETS_DIR ?= assets
+
+## Define the default target (make all)
+.PHONY: default
+default: all
+
+# Verify environment, and define PLUGIN_ID, PLUGIN_VERSION, HAS_SERVER and HAS_WEBAPP as needed.
+include build/setup.mk
+
+BUNDLE_NAME ?= $(PLUGIN_ID)-$(PLUGIN_VERSION).tar.gz
+
+# Include custom makefile, if present
+ifneq ($(wildcard build/custom.mk),)
+	include build/custom.mk
+endif
+
+ifneq ($(MM_DEBUG),)
+	GO_BUILD_GCFLAGS = -gcflags "all=-N -l"
+else
+	GO_BUILD_GCFLAGS =
+endif
+
+# Include modular makefiles
+include build/*.mk