codebase: Remove web frontend and related services (#2067)

* codebase: Remove web frontend and related services

* refactor: Update StartPPROF to accept context and adjust related tests

* refactor: Simplify SetIfZero functions and update related tests

* config: Clarify DowngradeConfig method documentation regarding permanent removal of deprecated fields

* refactor: Rename setIfZeroAndWarn to setDefaultIfZeroWarn for clarity and update related calls

* refactor: Update error handling in DataHistoryManager and remove redundant error variable

docs/ADD_NEW_EXCHANGE.md

@@ -1,6 +1,6 @@
 # GoCryptoTrader ADD NEW EXCHANGE
 
-<img src="https://github.com/thrasher-corp/gocryptotrader/blob/master/web/src/assets/page-logo.png?raw=true" width="350px" height="350px" hspace="70" alt="GoCryptoTrader project logo">
+<img src="/docs/assets/page-logo.png" width="350px" height="350px" hspace="70" alt="GoCryptoTrader project logo">
 
 [![Build Status](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml/badge.svg?branch=master)](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml)
 [![Software License](https://img.shields.io/badge/License-MIT-orange.svg?style=flat-square)](https://github.com/thrasher-corp/gocryptotrader/blob/master/LICENSE)

docs/EXCHANGE_API.md

@@ -1,6 +1,6 @@
 # GoCryptoTrader Unified API
 
-<img src="https://github.com/thrasher-corp/gocryptotrader/blob/master/web/src/assets/page-logo.png?raw=true" width="350px" height="350px" hspace="70">
+<img src="/docs/assets/page-logo.png" width="350px" height="350px" hspace="70">
 
 [![Build Status](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml/badge.svg?branch=master)](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml)
 [![Software License](https://img.shields.io/badge/License-MIT-orange.svg?style=flat-square)](https://github.com/thrasher-corp/gocryptotrader/blob/master/LICENSE)

docs/FILES.md

@@ -1,6 +1,6 @@
 # GoCryptoTrader File Hierarchy
 
-<img src="https://github.com/thrasher-corp/gocryptotrader/blob/master/web/src/assets/page-logo.png?raw=true" width="350px" height="350px" hspace="70">
+<img src="/docs/assets/page-logo.png" width="350px" height="350px" hspace="70">
 
 [![Build Status](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml/badge.svg?branch=master)](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml)
 [![Software License](https://img.shields.io/badge/License-MIT-orange.svg?style=flat-square)](https://github.com/thrasher-corp/gocryptotrader/blob/master/LICENSE)

docs/OHLCV.md

@@ -1,6 +1,6 @@
 # GoCryptoTrader OHLCV support
 
-<img src="https://github.com/thrasher-corp/gocryptotrader/blob/master/web/src/assets/page-logo.png?raw=true" width="350px" height="350px" hspace="70">
+<img src="/docs/assets/page-logo.png" width="350px" height="350px" hspace="70">
 
 [![Build Status](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml/badge.svg?branch=master)](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml)
 [![Software License](https://img.shields.io/badge/License-MIT-orange.svg?style=flat-square)](https://github.com/thrasher-corp/gocryptotrader/blob/master/LICENSE)

docs/README.md

@@ -1,6 +1,6 @@
 # GoCryptoTrader Documentation
 
-<img src="https://github.com/thrasher-corp/gocryptotrader/blob/master/web/src/assets/page-logo.png?raw=true" width="350px" height="350px" hspace="70">
+<img src="/docs/assets/page-logo.png" width="350px" height="350px" hspace="70">
 
 [![Build Status](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml/badge.svg?branch=master)](https://github.com/thrasher-corp/gocryptotrader/actions/workflows/tests.yml)
 [![Software License](https://img.shields.io/badge/License-MIT-orange.svg?style=flat-square)](https://github.com/thrasher-corp/gocryptotrader/blob/master/LICENSE)