feat: Added cal-heatmap dependency

frontend/static/frontend/css/cal-heatmap.css

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+.ch-container{display:block}.ch-container,.ch-domain,.ch-domain-container,.ch-domain-container-animation-wrapper{overflow:visible}.ch-domain-container.in-transition .ch-domain-container-animation-wrapper{overflow:hidden}.ch-domain-bg{fill:transparent}.ch-domain-text{fill:currentColor;font-size:10px}.ch-subdomain{overflow:visible}.ch-subdomain-bg{fill:#ededed}.ch-subdomain-bg.highlight{stroke:#444;stroke-width:1px}.ch-subdomain-bg:hover{stroke:#000;stroke-width:1px}.ch-subdomain-text{font-size:8px;pointer-events:none}[data-theme=dark] .ch-subdomain-bg{fill:#2d333b}[data-theme=dark] .ch-subdomain-bg.highlight{stroke:#768390}[data-theme=dark] .ch-subdomain-bg:hover{stroke:#636e7b}#ch-plugin-legend>svg{background:transparent;color:currentColor}#ch-tooltip{background:#222;border-radius:2px;box-shadow:2px 2px 2px rgba(0,0,0,.2);box-sizing:border-box;color:#bbb;display:none;font-size:12px;line-height:1.4;padding:5px 10px;text-align:center}#ch-tooltip[data-show]{display:block}#ch-tooltip-arrow,#ch-tooltip-arrow:before{background:inherit;height:8px;position:absolute;width:8px}#ch-tooltip-arrow{visibility:hidden}#ch-tooltip-arrow:before{content:"";transform:rotate(45deg);visibility:visible}#ch-tooltip[data-popper-placement^=top]>#ch-tooltip-arrow{bottom:-4px;margin-left:-4px}#ch-tooltip[data-popper-placement^=bottom]>#ch-tooltip-arrow{margin-left:-4px;top:-4px}#ch-tooltip[data-popper-placement^=left]>#ch-tooltip-arrow{right:-4px}#ch-tooltip[data-popper-placement^=right]>#ch-tooltip-arrow{left:-4px}#ch-tooltip[data-theme=dark]{background:#636e7b;color:#cdd9e5}