### Motivation

Add command `trace` to query trace by trace ID and visualize the traces

### Modification

- Add command `trace` to query and visualize traces.

- Move `main.go` to `cmd`, as per the recommendation of GO CLI package structure.

- Move GraphQL query to individual `*.graphql` file, for more friendly development, with IDE plugin.

### Result

- Traces can be queried and visualized by `swctl trace <trace id>`

- GraphQL queries can be debugged in IDE, with some plugins

### Motivation

Visualize heat map and enhance Display logic

### Modification

- Add HeatMap widget to visualize thermodynamic metrics.

- Refactor display logic.

### Result

- Thermodynamic metrics now can be visualized.

- Display function takes more extra information to determine more details

- Closes https://github.com/apache/skywalking/issues/4461

### Motivation

Support top N entities and thermodynamic metrics commands

### Result

- Commands `metrics top n` and `thermodynamic` are added

- Closes https://github.com/apache/skywalking/issues/3898

- Closes https://github.com/apache/skywalking/issues/3897

### Motivation

Adopt the new API of multiple linear metrics, https://github.com/apache/skywalking/pull/4214

### Modification

- Rewrite the pxx metrics with the new API

- Slightly refactor the GraphQL client into individual package, according to the query protocol

- Enhance the Ascii Graph display style

### Result

- CLI is compatible with the latest backend

- Ascii Graph can display multiple charts in one screen

* Update NOTICE year

* Update NOTICE

* Make use of server timezone API when possible

* Update duration.go

* Add documentation for timezone option

* fix schema TraceBrief definition bug

* TraceBrief Data rename to Traces

* fix schema TraceBrief definition bug